Allowed list on trunks

[suthomas1]

Hello All,

There is a trunk port which currently allows has no restrictions. If we change this & add specific vlan list there, will the users already connected there encounter any drops or issues.( current vlans will be allowed on these)


Appreciate all inputs. Thanks in advance.

[Prabath Godevithanage]

Hi, I always would do it within a change window but I haven't notice any dropout in the past(3750 & 6500 platforms) in the clients for allowed vlans. you have to make sure to apply the changes on the port-channels on the aggregated links otherwise your ports win go into error-disable mode due to inconsistency

[Mark Malone · Accepted solution]

Hi No it wont as long as you use the add statement you wont cause any issue , if you don't use add it will wipe the config with new vlan only and cause issues